protected void gvAll_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            KB.DeleteConstant(e.Keys[e.RowIndex]);
        }

protected void gvMaster_RowDeleted(object sender, GridViewDeletedEventArgs e)
        {
            Session["MasterBound"] = false;
            gvMaster.DataBind();
        }

 <asp:GridView ID="gvMaster" runat="server" AutoGenerateColumns="False" ShowFooter="True"
                                DataKeyNames="id"
                                ondatabinding="gvMaster_DataBinding"
                                onselectedindexchanging="gvMaster_SelectedIndexChanging"
                                AllowPaging="True" PageSize="15" OnPageIndexChanging="gvAll_PageIndexChanging"
                                onrowediting="gvAll_RowEditing"
                                onrowcancelingedit="gvAll_CancelingEdit"
                                onrowupdating="gvMaster_RowUpdating" CellPadding="4" 
                                ForeColor="#333333" GridLines="None"
                                onrowdeleted="gvMaster_RowDeleted" 
                                onrowdeleting="gvAll_RowDeleting">
...
<asp:TemplateField ShowHeader="False">
                                <ItemTemplate>
                                    <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" 
                                        CommandName="Edit" Text="Edit"/>
                                    <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" 
                                        CommandName="Delete" Text="Delete"/>
                                </ItemTemplate>
...
</asp:TemplateField>